Add's the configuration file option "dump_json" or command line
options [-j|--dump-json] to have swift-dispersion-report output
the report in json format. This allows the dispersion report to
be more easily consumed elsewhere.
There's also a few pep8 fixes and removal of unused imports.
Change-Id: I2374311ccbef43e6bbae24665c9584e60f3da173
"Also adding the new swift-recon and swift-ring-builder manpages to this set"
"Adding new manpages for configuration files and also making changes according to previous review suggestions"
"removing the Author line from the manpages according to suggestions"
Change-Id: I256d2b2851b55a379b59011894f214bf55ba7da9